Covalent?

Tell me if these are covalent or ionic?
1. NaCl
2. PO4
3. SO2
4. CCl4
5. NI3
6. KCl
7. N2O3
8. Li2O
9. CH4
10. SF2
Are the compounds above polar or non polar?





Choose 5 and draw the lewis dot structure for them (at least 3 must be covalent)





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